Now, more and more hospitals and doctors in the world are getting interested in laser medicine, more and more people are getting understanding on laser surgery operations and physical therapy. Following the cotinuous comprehensive investigation of laser medicine, the clinical applications of laser has been further expanded and per a lot of indications have been found. As is well known, CO2 laser is one of the most famous medical lasers. In recent years, we concentrate our at to it, a new minitype CO2 laser surgery instrument has been built after improving repeately, the improvement depends on the experiences of hundreds of doctors in hundreds of hospitals for curing ten thousands cases. Our new laser surgery instrument has been improved in five-main characters: 1) Expanding the range of adjustable power into 3-10 W; 2) Making the laser output flexible, dose from 0.1--105 W/cm2 for different cures; 3) Expanding its applications into about 50 indications of general surgery, dermatology, otolaryngology, and gynecology. Which have been proven effective or very effective.